I dont see it. I think Curry's style was all wrong for Oscar. If anything, Trinidad would be the one with the wrong style for Curry.
I think Oscar peaked below Welter. At 147 and upwards he had a tendency to fade in longer fights and though he was still quicker than most, he definitely wasn't the blur he'd looked between 130 and 140. Appreciate that Curry's peak was short, but by the time of the Starling rematch, masterclass against Colin Jones and demolition job on McCrory, he really was looking like the complete fighter. Amazing balance, technique, accuracy, speed and a pretty tight defence, despite being the one applying pressure most of the time. Napoles-esque. I think Curry in full flow was a better Welter than Oscar was, although Oscar clearly proved himself the better, more reliable fighter overall. Put a 1984-85 Curry in with a 1998-99 De la Hoya, and I'd back Curry to win a decision.
Curry. Oscar was just not that good at welter. there would be an absolute ton of tough fights for him at this weight and this is one of them.
I think Oscar is more elite and he had a better jab which would be the difference. I think he outjabs Donald and lands combinations, and wins a UD. I don't think he knocks him out. Oscar did not have much of a right hand.
It's very, very, very hard for me to envision Oscar outboxing Curry. Curry was the far superior technician of the two, and he had a higher ring IQ than Oscar. Oscar's best chance would be to force Curry to trade with him, and catch him with a big hook. A technical chess match would favor Curry big time.
Outboxing as much as using the jab. Oscar had a good jab. I don't see Donald falling for the left hook since, although he was hit by McCallum's left often. and Honeyghans right easily.. Donald was not that great defensively. He didn't move his head much at all, just that he countered so well guys usually didn't have the chance to hit him. Even if you look at his McCrory fight, he was hit with right hands by Milton. And this is a fight he supposedly won easily.